Angle-indicating level and plumb



E. F. CERVENY. ANGLE mnxcmme LEVEL. AMD Puma. FnLezn MIG. 5. 19.21.

gi I ttoz "um E'IIL F. CERVENY, 0F CHECAGO,

ANGLE-ENDZCATHB- pplicaton led august T all 207mm maj/ concewt:

Be it known that i, Erano Cmivmvr. a citizen of the United States, residing at Chiago, in the county of Cool: and State of Vinois have c il invented certain new and useiu improvements in Angle-indicating Levanl Flumlos, ot which the tollowl a specification.

The present invention appertains to improvements in those implements devices conventionally known levels, by means ot which not only perpendiculars and horizontals may be determined, but the various angles oi inclination may be ascertained or measured.

The invention is characterized as to novelty by the provision of a gravity-operated indicator device mounted upon sensitive bearings and carrying at its periphery suitable graduations capable or. being viewed through a sight window from the edge of the implement, said device carrying pointer elements arranged to co-act with stationary indicator dials whereby the angles may be ascertained by viewing the indicator from either side of the instrument. A feature of novelty or' this arrangement resides also in the provision ot means tor adjusting the iny dicator so as to maintain accuracy in its registration or action with regard to the stationary indicating means.

These and such other objects as may hereinafter appear are attained by the novel construction, combination and arrangement oil parts to be hereinafter specifically descrioed and claimed.

Reference will now be had to the accompanying drawings forming a part of this specication, wherein:

Figure l is a side elevation of an instrument constructed in accordance with my invention.

Figure 2 is a transverse sectional view therethrough.

Figure 3 is a sectional view on the indicated by the line 3-3 of Figure 2.

Figure 4s is a similar sectional view on the plane indicated by the line i-l of Figure 2.

Figure 5 is a fragmentary top plan view.

Figure 6 is a horizontal sectional view on the plane indicated by the line 6 6 of Figure 4. p

rl`hroughout the following detailed description and on the several figures of the plane ELLINOIS, ASSIGNQR OF NE-HALF TO SAUL YVETZ, OIE CHICAG'G, LLINOS.

LEVEL AND PLUME.

192;. Serial No. 489,998.

designates the stock portion of the instrunient which may 'oe of any desired material or construction. and cut out centrally thereof to form a recess or pocket 2 into which the indicator device forming the special subjectmatter of this invention is mounted.

ri"he indicator device comprises the side frame pieces 3 secured together in spaced relation by the fastening means 4 at the corners thereof and supported from the top plate 5 set into the upper edge ot the stock in the customary manner. Centrally this supporting plate is provided with a glasssight opening 6 upon which is delineated an indicator line 7. Between the side trame pieces 3 is mounted an annular indicator member 8, the outer surface of which is provided with suitable graduations as indicated at 9, said 0raduations being in degrees of a circle and designed to register with the indicator line 7 before mentioned. This annular member is provided with a spider l0 comprising three equally spaced arms and in two ot such arms are ixed corresponding or counterbalance weights ll so that said two arms occupy a position below the center ot gravity and cause the indicator to maintain a determined position in the use orp the article after the customary manner.` rlhe shaft l2 for the annular member 8 is mounted in the frame sides 3 and carries at both oi its outer extremities pointers or hands 13 which is designed to co-operate with dials la aiilxed to opposite sides of the respective frame members 3. The stock l is cut out with openings corresponding to the area of the dials 14C and a glass window is provided over such openings so as to permit the readings ot' the indicator to be readily viewed from either side of the instrument.

An important feature of this construction lies in the provision of adjusting means consisting of the screw or threaded shaft l5 connecting the two weighted arms of the spider upon which is carried the adjusting nut 16 and a cooperating lock nut 17. By means ot' this arrangement the indicator member 3 may be adjusted and such adjustment fixed to insure accuracy of registration of the indicator elements.

'lhe utility of the device hereinbeiore de-d scribed is readily recognized and does not need further description, and it is to be understood that changes may readily be made in the ininor details of construction. oi' the device Without departingI from the spirit or the invention and Within the scope of the claim hereto appended.

Having thus described my invention, what i claim as new and desire to secure by Letters Patent is:

An angle indicating level and piuinb of the class, described comprising a stock having a centrai recess thereiin an indicator device inounted in seid recess and comprising supporting plate having e sight opening bearing an indicator iine, a trarne sustained by said plete, en ennuiar indicator member thereupon, and a lock nut zidsipted to iii; the 30 adjusting; nut at en adjusted position.

in testimony Wiiereoi i affix niy signature.

EMIL 1F. GERVFJNY. 

